Electron Self-Exchange Kinetics for a Water-Soluble Ferrocenium/Ferrocene Couple:  Rate Modulation via Charge Dependent Calix[6]arene-p-sulfonate Encapsulation

Both trimethylaminomethylferrocene (TMAFc+) and the corresponding ferrocenium species can be encapsulated by calix[6]arene-p-sulfonate in water as solvent. Selective encapsulation of the TMAFc2+ form provides a basis for electrostatic acceleration of the TMAFc2+/+ self-exchange kinetics. Encapsulation of both redox forms by the anionic host, however, eliminates the reactivity enhancement effect.